Transmission gearing



April 8, 1930. c. E. F. AHLM ET AL TRANSMISSION GEARING Filed Jan. 8, 1925 2 Sheets-Sheetl 1 TUE Patented Apr. 8, 1930 UNITED Asiufrsls PATENT OFFICE CHARLES'E. F.. AHLM, OF CLEVELAND, AND GEORGE M. SOULE, OF SOUTH EUCLID, OHIO, ASSIGNORS TO AUTOMOTIVE PATENT HOLDING COMPANY, OF CLEVELAND,

OHIO, A CORPORATION OF DELAWARE i TRANSMSSION GEARING Applicationiuedianuafy s, 1925. serial No. 1,326.

This invention relates to automobile transmission mechanism and is particularly adapted for 'use with already existing transmission on certainftypes of cars. l/Ve have shown an s embodiment of our invention vwhich is capable of transmitting either direct drive through the agency of a dental clutch ory of transmitting a reduced or increased speed to a driven member 'through an internal gear of slightly larger pitch diameter than a driving I better support by such bearing.

or driven pinion with which it may engage. Other speed relations may be used effectively Within the scope of our invention. Y

It is an object to provide a knovel gearing arrangement of the class shown wherein one of the gears has a supporting shaft extending freely from its bearing, and projecting the least distance therefrom lwhen the external gear engages the internal gear. Further it is an object to kso arrange an internal gear and clutch relative to a pinion carrying member, .having a bearing support, that the pinion maybe at least partially supported inl one of its driving positions by its engagement with the teeth of the clutch, while in its other position it may be moved close to the bearing for A further object is to provide a simple effective bearing construction for a shaft which willy permit 5 transmission to cause a parallel relative movement between a pinion and internal gears to vengage or disengage one with the otlierl andbodily ina lateral direction for moving the pinion to engage othery gears or a 3 clutch toaccomplish speed changes. Anv object is to arrange the elements of this mechanism in such a manner that Vvthe mechanism will be eflicient-inits operation, andcapable ofy beingA easily and cheaply manufactured 5 and assembled.' A further object is to proy n y v to engage the clutch or gear respectively.

vide for effectivelysealing the casing, wherein' the mechanism operates kagainst the escape of lubricating oil. Another specil'icobject, is

the Aprovision of a two part eccentric bearinezmembler, .each Part bf which mayrelto such a shaft to move therein without likeli- Vthe clutch or the gear. y vpl'oyed for imparting this movement to the support a substantial roller bearing for an internallysplined drivingl member and to provide formounting a shifting lever in a spherical aperture between the two parts of the-bearing members for shifting a pinion carrying Vshaft within vthe tubular driving The essential novel characterisv features of our'inven- In the drawings, Fig. 1 is a substantially ycentral longitudinal cross-section through our transmission; Fig. 2 is a transverse crosssection taken along the lines 2 2' of Fig. l; Fig. 31s a similar cross-section taken along 'the lines 3 3 of Fig. 2; Fig. 4; is a sectional Aplan as indicated by the lines 4 4 on Fig. 2

showing a portion of the gear shifting mechanism. Our invention includes a casing 1,A preferably formed in three parts as shown and in which is supported `a driving memberv or shaft 2,'rigidly carrying a dental clutch 3, and an internal geart. A driven-,shaft 5 is shown as splined within a tubulardriven .member 6, and carries arpinion having externally formed teeth 7 The shaft 5 is capable V`of being moved longitudinally and transversally so thatt-he pinionmay engage either The mechanism empinion carrying shaft includes an eccentric .bearingmember l0 having its axis of rota-v tion` olf-set from lthat of theishaft l5 so that direction will move the teeth of the pinion into alignment with a portion of the` teeth of the gear 4 and on opposite rotation,.-into alignmentwith the clutch. Thesame lever indicated at 11 that is used to accomplishthis rotating movement of the' eccentric also serves .as a shifting member for the pinion whereby it may be slidl either forwardly or rearwardly The foremost portion of the' ,casingindicatedat l5 ispreferably tubular inform for supporting a rollerbearing 16 offfsubstan-v tial llength which `,carries the driving 'shaft a rotating movement ofthe eccentric in one 2. This casing member is provided With flanges at either end at 17 and 18 respectively, the fermer being adapted to engage a siinilar flange F on an already existing transmission casing() and it it'o' be rifiifdersteod that this flangev 17' may take' any orin' to bestserve this purpose. lNithin the inain casing 20, We lpreferebly, provide CombinationY radial and thr esigibile beelge ,21' i@ Better Sue: 1f) port the gear carrying' extension of the shaft 2. t is to be noted that the gear 4 and the clutch 8 are Yseparated longitudinally by distance slightly greater than the overall length of the pinion teeth 7', and that the position Vbetween the When tlie' piiiitiii is 't i i nt it'itli the cliiteli; separate enggingt'fitceslas vand tliitlettcli tooth ofthe pinihn engage pleinentary tooth on thel olnteh bv rea" lieiiig `tiined in etial pitli' d iiif'e'ter' tliat'in l' lardly eteiidetlp "v' tttits bearing, tlie' pinion ade"- l''d til I"re ent side l 5 A" ,th-weleer" tion.

. 'llo' nio'st eiieotivly stippfor't the pinion shaft aiiidwtonv provide bodly iiioving' the pliniii `nto for: clutch lving position, We prefterriblyKsuppiiittliev di vi, `sleeve 6 in radial" roller bearingsY 3l) ziiid 3l tvliith for s'ile off' longittidiiial c""iijiie` ness it the tra l l L. :l l v i iii oonir either on each face are, when the bearing is assembled.I adapted to receive a pivot pin 51 for the shipper lever l1. rlChe lever at the fnlcrum point is in the forni of a ball Whch closes the spherical opening? in the bearing' ornied the depressions While the forward and rearward swing of the lever is permitted by the cut-awayrportions of the bearing as at and 50?'. The lateral bodily nioveiiieiit of the np-` il a'iin the leverlfr changing thetfstefsefistiii sf me pluie-ia nie gem or c liiteh- 'is permitted by a peripheral slot 55 through the casing 2O as shown in Fig. fl. At' either end of this slot and facing in opposite directions, We preferably provide enti'ice'slot o'tlieilev'elr :it'l 'l 5? to' giiide having van opening' stiiiicinftly large to p`L the bodily iii'oveineiltv ottlie driving sleeve 6; 'l`o, eslile'e'tii`iely Close this ape'rtiire and to provide leling lint for pi'iewieiiting i6"`it`u 1i"i'nioveiiirofthe 'Slee-m, we provide ilaiigdtil tslidiiig l at, t the infr' surface 65 ofthe ii'ie'inbr Gt),- e`sc''p'e` of oil at this point Ybei prevented by annular groove G6 ivhi'e'li be ille'd ivith fibr'oiis inaterial.

HavingI tlis' described our" invention, We laiin lf. Irl a transmissiiifgearing in combinat'oii, a pair' f r'tata'ble members, one adapted todri'v'e the tlier", a dentlol'iitoh and an interiill "er4 o'arried by one' of' the' members,- a piiiiiicarried the 'other' nen'lber, a splined sleeve Carrying one of said rotatable' ineinber g a rolling bearing for" the sleeve, an eebentrio shell :sii'ppring said bearing' ,and iileans erteiidiig' Within saideccentric shell comprising a pivote'd lever for nio'ving the e'^"tie te aligi'tliteeth of the pinion with the 'teeth fY the Gluten or gear and' te subseyulitlj''C'lii'stile piiiiii tbV engage the 'clutch 'or gr.

2: Irl oiiibiilatin :i driving lneiiibi haviig dental Clti "lif aiid all internal VgearV c'rried rigidly ,tl 'reivith',' a' shitat-leV driven Al'riib'eili v'g'' vwiiin adapted t 'engage niet th" mailer' ai, sens' esieev supf @riflettente ecn A Seti tlie 1 viso centric member, for rotating the bearing and for subsequently shifting the pinion carrying member.

3. In combination, a driving and a driven member one member having in'internal gear and clutch, the other member having a pinion adapted to selectively engage either the clutch or gear, an eccentric bearing for one of said members formed of two transversally joined parts, adapted to be rotated to align the pinion with either the gear or clutch, a splined sleeve within the eccentric bearing for supporting the member, rolling bearings at either end of the eccentric bearing member for supporting the sleeve, a shifting member carried exteriorly of the sleeve between the bearings, and rigid with the pinion carrying member for causing the pinion to engage the gears, and a shifting lever cooperating therewith having a fulcrum comprising a spheri cal member supported by a recess formed between the abutting faces of the eccentric bearing.

il. In combination, in a transmission gearing, a rota-table member having an internal clutch and gear, said clutch'and gear being separated longitudinally, lanother rotatable member having a pinion adapted to mesh with either the clutch or gear, said pinion having a length less than, theV longitudinal distance between the clutch and gear, a bodily movable member, a splined sleeve extending therethrough, rolling bearings carried by the bodily movable member adapted to support the splined member, and a pivoted lever extending within said bodily movable member and having a connection with the pinion shaft for causing first the lateral movement ofthe pinion shaft to align the pinion with the gear or clutch and subsequently to effect the longitudinal shifting vfor causing itto drivingly engage therewith.

5. In a gearing, a rotatable memberk having a plurality of internally toothed members of different pitch diameters, another rotatable member having an externally toothed member arranged to engage selectively therewith, a drum comprising separate members eccentrically mounted with reference to one of the rotatable members and carrying the same, and a member pivoted substantially at the line of separation of said separable members and having a connection with said last named rotatable member to effect relative longitudinal shifting between the toothed members for causing their engagement.

6. In a' gearing, a pair of rotatable members to be connected, a plurality of internally toothed members carried by one of said rotatable members, an externally toothed member carried by the other and arranged'to engage selectively with said internally toothed member, an eccentric bearing member for one of the rotatable members arranged to be moved to cause the toothed members of the respective Vrotatable members to drivingly align, an operating member extending intoV the eccentric member, and having a connection with the rotatable member supported thereby lfor causing longitudinal relative u tures.

CHARLES E. F. AI-ILM.l GEORGE M. SOULE` hereunto affix our signa- 

